3 problems

Consider the Bradley–Terry model with $5$ alternatives, pairwise-comparison intensities $\lambda_{ij}$, and a full support $D$-optimal design with weight $w_{ij}$ on pair $(i,j)$.…

Let $m$ be the number of alternatives, let $\binom{m}{2}$ pairwise-comparison intensities be denoted by $\boldsymbol{\lambda}=(\lambda_{ij})$, and let $w_{ij}$ be the weights of a…

Bradley–Terry density conjecture. The closure in $\mathbb{R}^n$ of the set $\mathcal{X}_n^{B\text{-}T}$ is $\mathcal{X}_n$. Although the Bradley–Terry model appears more restrictiv…